Other than confusion what was Ford's first reaction when it came to being confronted by Fidds with a tiny child who called him Daddy with such enthusiasm?
Well there was a little surprise at the first instance ; and Ford is Aro/ace in this au so after confusion and surprise came the knowledge that he couldn’t possibly be a dad because he’s never dated anyone or anything. So than he starts thinking about what possible anomalies would want to disguise there offspring as a nearby human resident’s child.
Than Fiddleford starts yelling at him before he could remember that “Hey I have a twin who could make babies!”. So now he’s feeling pain and fear while he desperately tries to explain to an irate Fiddleford that he’s not a bad dad because he’s NOT A DAD.
At this point of course he’s set Molly down, and she’s started to count his fingers while holding is hand and realizes that this is not her daddy, so she starts screaming and trying to pull away. So now Fiddlerford and Ford are trying to calm her down and keep her from running outside when suddenly the door get’s bust in and this huge mullet man has grabbed Fiddleford by the collar and WAIT A SECOND IS THAT STANLEY?!
So, yeah, if everything hadn’t gone crazy at once he probably would have gone into scientist mode trying to figure out the mystery of the impossible chid. But Ford was instead rather busy trying to understand why the world had suddenly gone insane.